Feb 07, 2023 by HM

House prices in St Mellons (CF3 1)

This article reveals price per square metre data and various charts to help you understand current housing market in St Mellons (CF3 1).

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Price per square metre

Knowing the average house price in St Mellons is not much use. However, knowing average price per square metre can be quite useful. Price per sqm allows some comparison between properties of different size. We define price per square metre as the sold price divided by the internal area of a property:

£ per sqm = price ÷ internal area

E.g. 55, Brynbala Way, St Mellons, sold for £250,000 on Aug-2023. Given the internal area of 89 square metres, the price per sqm is £2,808.

England & Wales have been officially metric for many decades. However house price per square foot is sometimes prefered by those of sufficiently advanced age. They may want to convert metres on this page to square feet.

The chart below is called a histogram, it helps you see the distribution of this house price per sqm data. To make this chart we put the sales data into a series of £ per sqm 'buckets' (e.g. £2,350-£2,500, £2,500-£2,650, £2,650-£2,800 etc...) we then count the number of sales with within in each bucket and plot the results. The chart is based on 60 sales in St Mellons (CF3 1) that took place in the last two years.

You can see the spread of prices above. This is because although internal area is a key factor in determining valuation, it is not the only factor. Many factors other than size affect desirability; these factors could be condition, aspect, garden size, negotiating power of the vendor etc.

That said, the spread of prices will give you a feel of the typical range to expect in St Mellons (CF3 1). Of the 60 transactions, half were sold for between £1,890 and £2,540 per square metre. Notably, only 25% of properties that sold recently were valued at more than £2,540m². For anything to be valued more than this means it has to be more desireable than the clear majority of homes.

For the average, we calculate the 'median' or middle price. The median price per square metre in 'CF3 1' is £2,180. The table below shows how 'CF3 1' compares to neighbouring postcode sectors.

Postcode sector	Lower quartile	Middle quartile	Upper quartile
CF3 3 Rumney	£2,310m2	£2,650m2	£3,240m2
CF3 1 St Mellons	£1,890m2	£2,180m2	£2,540m2
CF3 2 Marshfield	£2,780m2	£3,360m2	£3,890m2
CF3 5 Llanrumney	£2,220m2	£2,530m2	£2,800m2
CF3 6 Old St Mellons	£3,190m2	£3,620m2	£3,920m2
CF3 0 St Mellons	£2,630m2	£3,110m2	£3,390m2
CF3 4 Llanrumney	£1,990m2	£2,440m2	£2,810m2

Will St Mellons house prices drop in 2024?

I cannot tell the future and don't believe anyone who says they can. I can however plot price trends - I have done this in the scatter plot below for CF3 1 (St Mellons). From this one could infer a range of reasonable possible future price falls or rises. In the chart below, the red dashed line is the house price trend for CF3 1 and the blue dots are the individual property sales that inform this trend.

Disclaimer: The data provided throughout this website about St Mellons and any other area, is not financial advice. Any information provided does not and cannot ever take in to account the particular financial situation, objectives or property needs of either you or anyone reading this information. Furthermore, I cannot guarantee the accuracy of any data shown. This information is based on sold prices and internal area data provided by Land Registry and other third parties - I do not verify the accuracy of the St Mellons data or any other data I am given.

Price map for St Mellons

I've just finished coding the map I link to below. I find it useful and I am sure it will help you in exploring St Mellons. You can zoom in all the way to individual properties and then all the way back out to see the whole country. The colours show the current estimated property values. I will explain more about the methodology and create a key next week.

House price heatmap for St Mellons

Street level data

Street	Avg size	Avg £/m2	Recent sales
Harris Avenue, St Mellons, CF3 1Q	104m2	£1,913	16
Brynbala Way, St Mellons, CF3 1S	93m2	£1,868	9
Hendre Road, St Mellons, CF3 1Q	89m2	£2,166	8
Meadvale Road, St Mellons, CF3 1U	80m2	£2,596	8
Trebanog Crescent, St Mellons, CF3 1S	88m2	£1,984	7
Penrhyn Close, St Mellons, CF3 1R	89m2	£1,876	6
Caernarvon Way, St Mellons, CF3 1R	88m2	£2,070	6
Canopus Close, St Mellons, CF3 1N	69m2	£3,046	6

Search for your street here.

Raw data

Our analysis of St Mellons is derived from what is essentially a big table of sold prices from Land Registry with added property size information. Below are three rows from this table to give you an idea.

Address	Paid	m2	£/m2
55, Brynbala Way, St Mellons	£250,000 Aug-2023	89	2,808
31, Menai Way, St Mellons	£200,000 Aug-2023	92	2,173
20, Abergele Rd, St Mellons	£95,000 Aug-2023	45	2,111

See the entire list of all sales in St Mellons (CF3 1) here.